Overview

This is header-only library that provide std::chrono based timer. No external dependencies.

Features:

1. Initialization

   Use default rep (double) and period (std::ratio<1>, which means seconds)

   flow::timer timer;

   Specify rep and period

   flow::timer<int, std::milli> timer;

2. Get elapsed duration of code fragment

    flow::timer timer;
    // Some work here
    auto dur = timer.duration();

3. Get elapsed duration and return result of any callable object

   // unpack std::pair
   auto [elapsed, result] = flow::timer<>::duration_r(
       // any callable object (like function or lambda),
       // callable object arguments...
   );

4. Get elapsed time of code fragment

   flow::timer timer;
   // Some work here
   auto elapsed_time = timer.elapsed();

5. Get elapsed time of any callable object

   // unpack std::pair
   auto [elapsed, result] = flow::timer<>::elapsed_r(
       // any callable object (like function or lambda),
       // callable object arguments...
   );

6. Get elapsed time and return result of any callable object

   // unpack std::pair
   auto [elapsed, result] = flow::timer<>::elapsed_r(
       // any callable object (like function or lambda),
       // callable object arguments...
   );

7. Get average execution time

   auto avg = flow::timer<>::avg(
       // count of iterations,
       // any callable object (like function or lambda),
       // callable object arguments...        
   );

8. Get average execution duration

   auto avg_dur = flow::timer<>::avg_duration(
       // count of iterations,
       // any callable object (like function or lambda),
       // callable object arguments...   
   );

9. Reset the timer

   flow::timer timer;
   // Some work here
   timer.reset();

10. Get the moment, when the timer was started (or was reset)

timer.started_in();

Usage

Put the flow directory in your project and include flow/timer.hpp. Nothing to build.

Requirements

C++17